Z89.521
Z89.521 — Acquired absence of right knee
Billable / specific codeICD-10-CMPOA exemptright
Z89.521 is a billable, specific ICD-10-CM code for acquired absence of right knee. It is valid for submission on a claim.
Risk adjustment
Z89.521 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
Z89.521 is named in 9 Medicare coverage policies — 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53057Billing and Coding: Home Health Occupational Therapy
- A53058Billing and Coding: Home Health Physical Therapy
- A53065Billing and Coding: Outpatient Physical Therapy
- A56796Billing and Coding: Lower Extremity Major Joint Replacement (Hip and Knee)
Related codes at this level
Codes that share Z89.52. If Z89.521 is not quite right, the correct code is usually one of these.
Questions about Z89.521
- Is Z89.521 a billable ICD-10-CM code?
- Yes. Z89.521 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z89.521 sit in the tabular list?
- Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).